Edward e



(No Model.) 2 Shets-Sheet 1. E. E. BUTLER. GAS ENGINE.

Patented Septr10, 1895.

(No Model.)

2 Sheets-Sheet 2. E. E. BUTLER,

GAS ENGINE Patented Sept. 10 1895.

EDWARD E. ELIT LER M PHUYO-UTNO. WASHINGTON. 0.0

U IT D ST T S Y PATENT Futon.

EDWARD E. BUTLEROF ATLANTA, GEORGIA, ASSIGNOR OF ONE-HALF TO ROBT. P. HORTON, OF SAME PLACE.

GAS-ENGINE.

SPECIFICATTON forming part of Letters Patent No. 546,110, dated $eptember 10, 1895..

Application filed August 18, 1394.. Serial No. 520,736. (No model.)

To a whom it may concern:

Be it known that I, EDWARD E. BUTLER, a citizen of the United States, residing at Atlanta, in the county of Fulton, State of 5 Georgia, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification.

The object of my invention is to. provide a simple gas-engine in which the explosion of to gas takes place once every revolution, alternating from one cylinder to the other. I attain this object by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a top plan of my engine, and

t 5 shows the valve mechanism, the gas-generator, and pipe connections. Fig. 2 is a side view of same. Fig. 3 is a section on line a b c d, Fig. 4. Fig. 4 is a section on line efg h t'j, Fig. 3. Fig. 5 is a section on line a: y, Fig.

2-0 3. Figs. 6 and '7 show a detail elevation and plan, respectively, of my exhaust-valve. Fig. 8 is a section of my admission-valve on line 70 Z, Fig. 9. Fig. 9 is a section of same online r s, Fig. 8.

z 5 Similar letters refer to similar parts throu ghout the several views.

My engine consists of two parallel cylinders made "in one casting, which is bolted to the frame or bed A The bed is fitted with bearings A in whichthe double crank-shaft l3 and eccentric-shaft B revolve. In each cylinder there is a piston B B each being connected to the crank in line with it by a pitman. On the crank-shaft B is a gear-wheel 3 B which meshes with a gear B on eccentricshaft 13'. The velocity of these gears is two to one, the large gear being on the eccentricshaft 13. The eccentric B Figs. 1 and 2, is connected to a rocker-arm B By means of a pin-joint the rocker-arm B has connected to it a rod B in the end of which there is fastened a cross-arm B". The exhaust-valve rod B is secured to one end of this crossarm, and the admission or gas valve-rod B 5 to the other end. Each end of the valve-rod B is bifurcated and slips over the end of the cross-arm B and valve arm 0, to each of which it is secured by a pin-joint. The end of the exhaust-valve rod B is secured in the end of the cross-arm 13*, with a set-screw which will admit of an adjustment forthe exhaust-valve. Each valve-rod is supported in guides O 0 the guide C being slotted to allow'the rod to move parallel to itself.

The exhaust-valve reciprocates in a seat provided for it in the generator, to be described hereinafter. Referring to Figs. 6 and 7, the construction of this exhaust-valve is as followszlt consists of a solid cylinder with transverse grooves D D cut through the cen- 6o ter of cylinder and ears D on its end to secure thevalve-rod to.

Referring to Fig. 5 it will be seen that the angle at which the slot is out should be such that when one exhaust-port E is closed the other port E shall be in communication with the exhaust-pipe E and vice versa.

The gas-generator F is bolted to the top of the cylinders at or near one end. This generator consists of a casting which contains two circular chambers F F*, extending partially around the casting. These chambers do not connect one with the'other. They are supplied with gasoline from a tank through pipes. The pipe F leading from chamberF, supplies the engine with its material, and the pipe F leading from the'chamber F supplies the lights that burn in the chambers F and F The generator also contains ports that will coincide with and bea continuation of So the ports E E in the cylinders. Through the center of the generator and parallel tothe center line of cylinders a hole is bored. This furnishes aseat for the exhaust-valve.

The admission-valve G, as as seen in Figs. 8 8 and 9, consists of the frustum of a cone hollowed ont near the middle, forming a chamber F A small hole G is drilled through the wall of the chamber and a half-round circular groove G extends partially around the valve 0 and passes throughthe hole G. The seat for this valve is made into the sphere-shaped head H, and the valve is held tightly in this seat by means of the spiral-spring 1-1. The chambers 1-1 H in the head H are the explo- 5 sion-chambers and are connected at the proper time with the generator-pipes by means of ports H 1-1 The operation of the engine is as follows: The gas in cylinder A we will consider has I00 just exploded and driven the pistons to the end of the stroke. The cylinder A is full of gas mixture. Now as the cranks revolve the pistons move toward the other end of the cylinder, the slot in the exhaust-valve, Fig. 5, places the port E in communication with the exhaust-pipe E and the piston 13 drives the products of combustion out of the cylinder A. The cylinder A being full of the explosive mixture of air and gas, the piston B will compress same as it approaches the other end of the stroke. WVhile the piston B is compressing the mixture the pipe K is supplying pure gas from the chamber F of the generator to the small port K It passes along this port K and through the hole G into the chamber F where it is lighted and burns in that chamber. The gas in chamber F is lighted by the continuously-burning jet K in the chamber F Now as the valve G revolves in the direction of arrow the gas will be supplied to the chamber F by means of the circulargroove G Figs, 8 and 9, and hole G. As the valve moves around the edge K of the opening to chamber F it will pass the edge K and the chambers F and F are disconnected. At the instant the chambers are disconnected the edge K of the opening passes the upper edge of the port H and the burning gas in chamber F will ignite the explosive mixture contained in the chamber H At the instant of explosion the valve G, by means of the circular port K has connected the port 11 with port K This port K being fed with gas and air from pipe F and air-valve K the cylinder A will till with the explosive mixture as the pistons move forward, due to the pressure in cylinder A. WVhen the pistons have reached the end of the stroke, as shown in Figs. 3 and 4, the valve G will have moved back to its central position shown, due to the eccentric. The gas in chamber F having been blown out by the explosion will relight from jet K, the chambers now being connected by opening in valve G. The exhaust-valve will have moved forward until the slot D connects the port E with pipe E when the cylinder A will exhaust on the return-stroke. During this return-stroke the valve G will move in the opposite direction of the arrow, and. the operation of exploding the mixture in cylinder A and of filling the cylinderA is similar to the operation just performed. In order to explode two cylinders, one on each revolution of the crank, itis easily seen that the eccentric operating the valves will move only one-half revolution, while the crank moves an entire revolution. To produce this effect I put the eccentric on another shaftB', and connect same with crankshaft B by means of gear-wheels, which will give a velocity ratio between the shafts B and B of two to one, respectively. If the airvalves K and K be closed, engine will stop. The jet K is supplied with gas from the generator by means of pipes F F and branch. YVhen the engine is not running, the gas-jets may be closed oif by closing valves M. To relight the jet K the cap can be taken off the top of chamber F the gas turned on with valve M, and lighted.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a gas engine the combination of the double cylinders, with the head H, containing ports H H explosion chambers H H gas ports K and light chamber F the rotary admission valve G and the reciprocating exhaust valve, means for operating the valves substantially as herein described.

2. The combination, in a gas engine, of double cylinders, the head H the gas generator and exhaust valve seat, the geared eccentric shaft and eccentric for operating valves with the reciprocating exhaust valve and rotary admission valve, substantially as herein described.

3. In a gas engine, having two cylinders and two pistons, the cranked shaft to which the piston rods are connected, and a gear on its end, combined withan endwise moving valve, a rotary valve, an operating rod or rods which operate the two valves simultaneously, a shaft for operating an eccentric, and which revolves but once while the crank shaft revolves twice, and a rocking rod to which both the eccentric and the valve rods are connected, substantially as specified.

4. In agas engine, the casting provided with the two cylinders, and. a cylinder head, having the two passages connecting with the ends of the two cylinders, a chamber F and a seat for a rotary valve, combined with a rotary valve, provided with suitable passages for the passage of both air and gas; a reciprocating valve provided with transverse grooves for connecting with the discharge passages of the cylinders; the pistons, a crank shaft, operated by'the pistons, and a separate eccentric shaft for operating the valves simultaneously; the two shafts beinggeared together and the crank shaft made to revolve twice as fast as the cocentric shaft, substantially as set forth.

EDWAR-D E. BUTLER. Witnesses:

H. R. HART, E. A. WERNER, Jr.

ICO 

